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Microsoft on Tuesday started rolling out its Windows Phone 7 "NoDo" update to the HTC Surround, the last U.S. smartphone on the platform to get the upgrade.

Separately, Microsoft also started rolling out the first security update for Windows Phone 7, which fixes nine fradulent third-party digital certificates.

Like other Windows Phone 7 users, those with an HTC Surround will receive two updates, the first of which will be for a minor update first rolled out in February. Once that's updated, users can move on to the March update, which includes copy and paste, improved Marketplace search, and faster app launching.

Windows Phones check for updates every three days, so it might not appear right away. If you don't want to wait, you can check for it manually via the Zune software on the PC. Just plug the phone in via USB and click "update now." Once the February update is installed, you will have to unplug the phone and plug it back in to receive the March "cut and paste" update. Microsoft has a how-to guide on its Web site.